Reliable and comfortable period underwear (which is specifically designed to absorb menstrual fluid) can improve your period experience. And many styles are now as chic as they are effective. However, some menstrual-underwear styles are gorgeous but leaky, and others have Hoover Dam–level security but diaper-like silhouettes. The style that will be best for you depends on your period flow and preferences. Over three years, we’ve tried more than 40 styles of period underwear in a variety of sizes and cuts from 18 brands, and we now recommend eight styles from seven brands.